Sunbathers at an Australian beach got an A-list star sighting on Oct. 4 when Jessica Biel was spotted strolling along the sand. But if they wondered why Justin Timberlake’s wife was wearing a bulky hoodie on a warm beach day, OK! can provide the happy answer: She’s potentially hiding a baby bump!

“Close friends are buzzing that she’s pregnant,” says a source. “Jessica hasn’t been going out lately, with the excuse that she’s not feeling well—but she’s so healthy, she never gets sick.” Considering the strain their relationship has been under lately, the couple’s pals wonder if the pregnancy is just the thing to unite them. After photos surfaced of Justin cozying up to a pretty backup singer in Paris six weeks ago, the actress, 32, flew Down Under to join her husband on his lengthy world tour.

“Jessica was devastated when she saw the pictures,” says the source. “But she’s been a lot more emotional in general over the past month or two.” The source says JT, 33, and Jessica have been trying to sort out their baby dilemma ever since they got married two years ago. “Justin promised her they’d try, then he changed his mind,” says the source. “Now Jessica is hoping this good news will cure his cold feet.”